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Applied Optics

Applied Optics


  • Vol. 39, Iss. 19 — Jul. 1, 2000
  • pp: 3197–3201

Multiple-beam interferometric determination of Poisson’s ratio and strain distribution profiles along the cross section of bent single-mode optical fibers

Fouad El-Diasty  »View Author Affiliations

Applied Optics, Vol. 39, Issue 19, pp. 3197-3201 (2000)

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Multiple-beam Fizeau fringes crossing bent single-mode optical fibers immersed in matching liquid reveal the existence of induced birefringence. Changes in the fiber cladding refractive index δn were measured from the fringe shift to an accuracy of ±1 × 10-4. Mathematical expressions were deduced to evaluate Poisson’s ratio and to describe the radial strain distribution profiles of bent optical fibers from the experimental values of the fringe shifts. Experimental results were obtained from microinterferograms. Studying bent fibers by application of Fizeau fringes interferometry provides a nondestructive, accurate, sensitive, and reliable method to measure their parameters and characteristics.

© 2000 Optical Society of America

OCIS Codes
(000.2190) General : Experimental physics
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2270) Fiber optics and optical communications : Fiber characterization
(060.2400) Fiber optics and optical communications : Fiber properties
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.3180) Instrumentation, measurement, and metrology : Interferometry

Original Manuscript: February 16, 2000
Published: July 1, 2000

Fouad El-Diasty, "Multiple-beam interferometric determination of Poisson’s ratio and strain distribution profiles along the cross section of bent single-mode optical fibers," Appl. Opt. 39, 3197-3201 (2000)

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